Cited by 170Cardiac Ischemia and ReperfusionCardiovascular Function and Risk FactorsDiabetes Treatment and Management

Rosiglitazone Treatment in Zucker Diabetic Fatty Rats Is Associated With Ameliorated Cardiac Insulin Resistance and Protection From Ischemia/Reperfusion-Induced Myocardial Injury

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Yue, Tian-Li, Bao, Weike, Gu, Juan-Li, Cui, Jianqi, Tao, Ling, Ma, Xin-Liang, Ohlstein, Eliot H., Jucker, Beat M.·2005·Diabetes

Abstract

The mechanism responsible for the enhanced myocardial susceptibility to ischemic insult in patients with type 2 diabetes is not clear. The present study examines the effect of rosiglitazone treatment on cardiac insulin sensitization and its association with cardioprotection from ischemia/reperfusion injury in an animal model of diabetes. Male Zucker diabetic fatty (ZDF) rats were treated with rosiglitazone (3 mg · kg−1 · day−1 orally) or vehicle for 8 days before undergoing 30 min of coronary artery ligation, followed by reperfusion for 4 h (apoptosis) or 24 h (infarction). Rosiglitazone reduced the blood levels of glucose, triglycerides, and free fatty acids; enhanced cardiac glucose oxidation; and increased Akt phosphorylation (Akt-pS473) 2.1-fold and Akt kinase activity 1.8-fold in the ischemic myocardium. The phosphorylation of two downstream targets of Akt, glycogen synthase kinase-3β and FKHR (forkhead transcription factor), was also enhanced by 2- and 2.9-fold, respectively. In rosiglitazone-treated rats, the number of apoptotic cardiomyocytes and the myocardial infarct size were decreased by 58 and 46%, respectively, and the myocardial contractile dysfunction was improved. Blockade of the insulin-Akt signaling pathway by wortmannin in the 8-day rosiglitazone-treated ZDF rats resulted in a markedly diminished cardioprotective effect of rosiglitazone. In addition, 8-day rosiglitazone treatment in Zucker lean rats or 2-day rosiglitazone treatment in ZDF rats, both of which showed no change in whole-body insulin sensitivity, resulted in a significant reduction in cardiac infarct size, but to a lesser degree when compared with that observed in 8-day rosiglitazone–treated ZDF rats. These results suggest that chronic treatment with rosiglitazone protects the heart against ischemia/reperfusion injury in ZDF rats, and that the enhanced cardiac protection observed after rosiglitazone treatment might be attributable in part to an improvement in cardiac insulin sensitivity.

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Crossref · 10.2337/diabetes.54.2.554

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  • Studies in older Zucker rats demonstrated reduced recovery from ischemia, which could be prevented by treating these animals with a TZD.

    “In contrast, studies in older Zucker rats demonstrated reduced recovery from ischemia, which could be prevented by treating these animals with a TZD (159, 322, 389).”

    From Cardiac remodeling in obesity (2008) · cites this paper as [389]

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Authors
Yue, T.-L., Bao, W., Gu, J.-L., Cui, J., Tao, L., Ma, X.-L., Ohlstein, E. H., & Jucker, B. M.
Affiliations
  • From the Department of Investigative and Cardiac Biology, GlaxoSmithKline Pharmaceuticals, King of Prussia, Pennsylvania
  • GlaxoSmithKline (United States) (US)
Venue
Diabetes
Published
2005-02-01
Volume
54
Issue
2
Pages
554-562
ISSN
  • 0012-1797 (ISSN-L)
  • 1939-327X
OpenAlex
W2154626866
Cited by
170
References
41
Citations by year
2025: 2 · 2024: 1 · 2023: 1 · 2022: 1 · 2021: 5 · 2020: 6 · 2019: 3 · 2018: 2 · 2017: 4 · 2016: 3 · 2015: 7 · 2014: 7 · 2013: 10 · 2012: 14
FWCI
13.37
Type
journal article
Language
en
Open access
Locations
  • Diabetes (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Cardiac Ischemia and Reperfusion
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiovascular Function and Risk Factors
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
Keywords
rosiglitazone, cardiac insulin resistance, insulin sensitization, myocardial ischemia-reperfusion injury, type 2 diabetes, Zucker diabetic fatty rats, Akt signaling, glycogen synthase kinase-3β, forkhead transcription factor, cardiomyocyte apoptosis, myocardial infarct size, myocardial contractile dysfunction, wortmannin, PPARγ agonists
MeSH terms
Rosiglitazone, Administration, Oral, Animals, Blood Glucose, Coronary Vessels, Diabetes Mellitus, Type 2, Fatty Acids, Nonesterified, Heart, Hypoglycemic Agents, Insulin Resistance, Male, Myocardial Infarction, Myocardium, Rats, Zucker, Triglycerides, Myocardial Reperfusion Injury, Thiazolidinediones, Rats

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